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WorksheetsCrystal Field Theory - MCQ Quiz
Total questions: 25
Worksheet time: 25mins
In an octahedral complex, the d-orbitals split into:
t2g (lower) and eg (higher)
eg (lower) and t2g (higher)
dz2 lower, others higher
Equal energy levels
The CFSE for a high-spin d4 octahedral complex is:
-1.6 Δo
-0.6 Δo
-0.4 Δo
-1.2 Δo
The spectrochemical series arranges ligands according to:
Oxidation state of metal
Increasing Δ values
Decreasing CFSE
Atomic mass of ligand
Which ligand produces the largest crystal field splitting?
I-
F-
CN-
Cl-
For an octahedral d6 low-spin complex, CFSE is:
-2.4 Δo + 2P
-1.2 Δo + 2P
-0.4 Δo
0
The factor that does not influence crystal field splitting is:
Nature of ligand
Oxidation state of metal
Coordination number
Melting point of ligand
The Jahn-Teller effect is significant for:
d0 configuration
d3 configuration
d9 configuration
d10 configuration
In a tetrahedral complex, the higher set of orbitals is:
t2
e
t2g
eg
Which is not true about high-spin octahedral complexes?
Formed with weak field ligands
Large Δo
Maximum unpaired electrons
Low CFSE
CFSE for a high-spin d5 octahedral complex is:
0
-0.4 Δo
-1.2 Δo
-2.0 Δo
Heat of hydration depends primarily on:
Atomic mass
Ionic radius and charge
Crystal symmetry
Ligand colour
In an octahedral field, t2g orbitals are:
Higher in energy than eg
Lower in energy than eg
Equal in energy to eg
Unaffected by ligands
Which is true for tetrahedral complexes?
Strong field ligands often produce low-spin complexes
High-spin is more common due to small Δt
e orbitals are lower in energy
Both B and C
Thermodynamic stability of a complex is related to:
Rate of formation
Free energy change (ΔG)
Activation energy
None of these
Kinetic stability refers to:
Heat of hydration
Resistance to substitution
Large CFSE
Positive ΔH
A strong field ligand generally produces:
Low-spin complex
High-spin complex
No splitting
Equal energy orbitals
Which ligand is weak field according to the spectrochemical series?
CO
NH3
H2O
I-
The Jahn-Teller distortion is caused by:
Unequal occupancy of degenerate orbitals
Pairing energy
High oxidation state
Low coordination number
In the comparison between VBT and CFT, CFT:
Considers orbital overlap
Neglects covalent character
Explains colour and magnetism better
Both B and C
The CFSE of a tetrahedral high-spin d7 complex is:
-0.6 Δt
-0.4 Δt
-1.2 Δt
0
[Ni(CO)3py]
Nickeltricarbonylpyridine
pyridinetricarbonylnickel(o)
tricarbonylpyridinenickel(0)
Which of the following will show Jahn Teller Distortion?
d1
d3
d5 high-spin
d8
With a particular ligand, under identical conditions which of the following ions is expected to form most stable complex?
La3+
Gd3+
Lu3+
Dy3+
Which of the following has larger crystal field splitting?
[Co(NH3)6]3+
[Rh(NH3)6]3+
What is the IUPAC name of [Cr(H2O)4Cl2]Cl
Tetraaquadichlorochromium(II) chloride
Tetraaquadichlorochromium(III) chloride
Dichlorotetraaquachromium(III) chloride
Dichlorotetraaquachromium(II) chloride
